Pool Rules Style B Sign in Spanish - 30 x 24 Inches on Styrene Plastic filter-internal-diameter_6 1/2 inches If pH is above 7

If pH is above 7

Avoid increasing hardness more than 30 ppm every couple hours

pre 4/16/2013

Because there is no ratchet mechanism

Pool Rules Style B Sign in Spanish - 30 x 24 Inches on Styrene Plastic filter-internal-diameter_6 1/2 inches If pH is above 7Pool Rules Style B, in Spanish. The lettering height on this sign meets specific state code. This sign is guaranteed to meet the state laws of Alabama, Louisiana, Maryland, Mississippi, New Mexico, North Dakota, Pennsylvania, Tennessee, Texas, Vermont and Virginia. Our compliance signs are thoroughly researched twice yearly and updated as needed. We guarantee our rules and regulations signs to meet specific state swimming pool codes within ninety days